Not much progress nowadays because of a meter of snow all over the country.... But a little "behind-the-scenes" work is allways good to have.

Been stripping the old carb I got from the slaughter, the one seen on some of my old pictures, fuel had become solidified, gaskets an o-rings stiff and broke, and there was a serious oxidation on the body. Tried first boiling it in citric acid, didn't do much, got a serious case of "mud" on it, scrubbed it of, but didn't do much for the look of it.

Brought it with me to fork, and got serious on it with a soft sand blaster here. Tht did the trick!Just got it masked, and ready for a clear coat.

I haven't noticed your updates until now, that's why I haven't commented - sorry! It's a pity that this blog section is a bit hidden.

Where exactly did you find those rusty bits? Throttle shaft looks good, no wear.

The little hole in the top is an air bleed. This carb has a high speed enrichment device in the secondary venturi: When the air speed through the carb is high enough, the jet can suck out petrol from the float chamber and cause an additional enrichment which is necessary under prolonged full load. The air bleed is there to mix the fuel with a little air to make an emusification. Same principle as with the main jets and emulsion tubes.

Just to see the pics. Very strange bug : If I remove the post, the pictures disapear again !

Re: First look

by testguy1 ... November 08, 2008, 10:03:07 pm

Just keep posting pictures (nice carbs, by the way!) , - at some point I will find the bug in the forum extension - the pictures *are* there, and as Anders experienced, they turn up when you change into normal forum-board view. (which you do when replying etc)

The blogging extension is very minimalistic, and the blogs are really implemented as standard forum posts, - in hidden foldes in the "General Matra Related" section.

There seems to be a bug in the blog software so attachments don't show properly, except in certain conditions. I'll chat with Lennart about it... we might be able to find a solution. Until then, I'm afraid you'll have to avoid posting messages with attachments in the blogs section.

Seems rather oxidated, so vil try to have a go at the parts with Autosol and some steelwool.

I would avoid steel wool on the carbs and only use a small brass brush. WD40 is great for cleaning old aluminium parts - kind to the metal and able to penetrate the smallest parts. Also useful for cleaning out channels in the carburettor body. Also, I suggest you screw out all jets before cleaning the body. The float chamber should also be emptied and cleaned.

There seems to be a stone caught in the secondary venturi! Good that it didn't make it into the engine...